CN101241456B - Data protection method and device - Google Patents
Data protection method and device Download PDFInfo
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- CN101241456B CN101241456B CN2008100093797A CN200810009379A CN101241456B CN 101241456 B CN101241456 B CN 101241456B CN 2008100093797 A CN2008100093797 A CN 2008100093797A CN 200810009379 A CN200810009379 A CN 200810009379A CN 101241456 B CN101241456 B CN 101241456B
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- data
- change amount
- lun
- data change
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1461—Backup scheduling policy
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
- G06F11/1451—Management of the data involved in backup or backup restore by selection of backup contents
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/81—Threshold
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/84—Using snapshots, i.e. a logical point-in-time copy of the data
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- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
The present invention provides a data protection method, including: setting LUN critical section; when data of the critical section changed, acquiring data variation; judging the data variation whether exceeding a default threshold or not, if the data variation exceeding the default threshold, starting snapshot. The invention also provides a data protector and a storage device of the data protector. The embodiment of the invetion divides part content in LUN into LUN critical section, starting quantitative tactics aiming at the critical section, in other words, snapshot is started only when the data variation exceeding the default threshold, when non-changing or changing lesser data in the critical section, the snapshot is not started to avoid wasting of resources.
Description
Technical field
The present invention relates to the data protection technical field, more particularly, relate to a kind of data guard method and device.
Background technology
Development along with miscellaneous service, data volume is with incredible speed rapid growth in the storage system, professional progress is also had higher requirement at aspects such as availability, reliability, extensibilities to the data treatment technology, and wherein, it is particularly important that safety of data seems.
The protected data technology of taking at present mainly is backup and snapshot (snapshot).
(Storage Network Industry Association SNIA) is defined as snapshot: snapshot is that data object is produced available copy fully, and it comprises this data object at sometime reflection in storage industry association.
Just, scan fast by the data of software to the disk subsystem that will back up, set up a snapshot logical unit number of wanting Backup Data (Logic unit number, LUN) and snapshot buffer storer (cache).When scanning fast, the data block that promptly will revise in the backup procedure is copied among the snapshot cache simultaneously fast.Snapshot LUN is one group of pointer, and it points to constant data block (in backup procedure) in snapshot cache and the disk subsystem.When regular traffic carries out, utilize the completely backup of snapshot LUN realization to former data.
Existing snapping technique mainly contains three kinds: virtual snapshot, splitter mirror picture and duplicate as required.
Snapping technique can obtain source LUN data in the very short time, and takies less storage space, is a kind of ripe relatively real-time guard technology.There are three kinds in the mode of current use snapping technique: the one, and user's manual operation; The 2nd, cooperate other business (as LUN copy, Remote Switched Port Analyzer) to use; The 3rd, periodically use snapshot.Wherein use the strategy of snapshot to have only periodicity to use snapshot automatically, promptly regularly produce snapshot: the snapshot that generates current point in time at the appointed time automatically.
In realizing process of the present invention, the inventor finds present this periodicity to use the method for snapshot, and there are the following problems at least:
Strategy is single, has limitation in some cases, for example in the cycle data do not have change or situation that the change amount is less under, also can start snapshot, cause the unnecessary wasting of resources.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of data guard method and device, does not have and changes or the change amount starts snapshot and the problem of the wasting of resources that brings more after a little while to solve prior art data in the cycle.
The embodiment of the invention is achieved in that
A kind of data guard method comprises:
When the data of default logical unit number LUN critical area change, obtain data change amount;
Judge that whether described data change amount surpasses a default thresholding, if described this data change amount surpasses default thresholding, then starts snapshot.
The present invention also discloses a kind of data protecting device, comprising:
First processing unit when the data of default LUN critical area change, obtains data change amount;
Judging unit is used to judge whether described data change amount surpasses a default thresholding, and sends judged result;
Second processing unit is used for sending the information that indication starts snapshot when described judged result indicates described data change amount to surpass described default thresholding.
From above-mentioned technical scheme as can be seen, compared with prior art, the embodiment of the invention is divided into the LUN critical area with the content of certain part among the LUN, start quantitative strategies at this critical area, that is to say, only when LUN critical area data change amount surpasses certain default thresholding, start snapshot, the critical area data do not have change or situation that the change amount is less under, then do not start snapshot, avoided the wasting of resources.
Description of drawings
Fig. 1 is the realization flow figure of a kind of data guard method of the present invention;
Fig. 2 is the process flow diagram of the embodiment one of a kind of data guard method of the present invention;
Fig. 3 is the process flow diagram of the embodiment two of a kind of data guard method of the present invention;
Fig. 4 is the structural representation of the embodiment one of a kind of data protecting device of the present invention;
Fig. 5 is the structural representation of the embodiment two of a kind of data protecting device of the present invention;
Fig. 6 is the structural representation of a kind of memory device of the present invention;
Fig. 7 is the structural representation of the data protecting device of the embodiment one of a kind of memory device of the present invention;
Fig. 8 is the structural representation of the data protecting device of the embodiment two of a kind of memory device of the present invention.
Embodiment
The embodiment of the invention is obtained data change amount when the write operation that exists at default LUN critical area the time, and when judging this data change amount and surpass default thresholding, starts snapshot.
In order to make those skilled in the art better understand the technical scheme of the embodiment of the invention, technical solution of the present invention is described in detail below in conjunction with drawings and Examples.
Please refer to Fig. 1, be the realization flow figure of a kind of data guard method of the present invention.
Specifically may further comprise the steps:
Step S101, setting LUN critical area.
The setting of described LUN critical area can with reference to LBA (Logical Block Addressing) (Logical BlockAddressing, LBA) scope is set, for example the space in a certain section on the LUN or a few sections LBA scopes is set to critical area.Perhaps LUN is carried out subregion, for example be divided into A, B, C, D, E ..., for example A, B subregion are set at critical area with wherein certain or some subregion.
Concrete setting can be carried out according to demand by the user.
Whether the data of step S102, the described critical area of monitoring change, if enter step S103; Otherwise, finish.
The operation of monitoring can periodically be carried out.
Step S103, obtain data change amount.
Whether step S104, judgment data change amount surpass a default thresholding, if enter step S105; Otherwise, finish.
Step S105, start snapshot, and have the change amount now and be set to zero, finish.
Described existing change amount can be stored on the default address.
Wherein, the data change amount of obtaining among the above-mentioned steps S103 can be a data accumulated change amount, data change amount and existing data change amount sum when just certain is at the write operation of default LUN critical area.Data change amount in the time of also can being certain at the write operation of default LUN critical area.Describe respectively below by embodiment one and embodiment two.
Please refer to Fig. 2, be the process flow diagram of the embodiment one of a kind of data guard method of the present invention.
Step S201-step S203 is identical with above-mentioned steps S101-step S103.
The data change amount of obtaining among the step S203 causes the write operation of the data of critical area for the user, the user can cause the change of data to increase, deletion or the renewal of the data of critical area, so, can be when the user operates, judge that this operation is whether at the write operation of described critical area, if can determine that then the data volume that writes is data change amount.
Step S204, add up with existing change amount.
Described existing change amount can be stored on the default address.
Step S205, judge that whether accumulation result surpasses a default thresholding, if enter step S206; Otherwise, enter step S207.
Described default thresholding can be set according to user's real needs, and can adjust at any time.
Step S206, start snapshot, and have the change amount now and be set to zero, finish.
Step S207, record accumulation result utilize it to upgrade existing change amount, finish.
Accumulation result is upgraded existing change amount, and the existing change amount after upgrading equals described accumulation result.
The mode that starts snapshot with existing timing is different, and what the embodiment of the invention adopted is quantitative strategies, also promptly: by to the monitoring of the data of LUN critical area, when the data change amount of this critical area surpasses default thresholding, start snapshot automatically.The user do not operate during, perhaps user's operation only relates to the outer data of critical area, that is to say, under the situation that the critical area data do not have to change or the change amount is less, do not start snapshot, reduce the number of times of snapshot, reduce resource overhead thus, and then increase work efficiency.
And specific aim is strong (only reacting at the data of critical area), improved resource utilization.In addition, decision logic is clear succinct.
Please refer to Fig. 3, be the process flow diagram of the embodiment two of a kind of data guard method of the present invention.
Some the time, in user's the single job, very big change takes place in the data of critical area, may need not to add up just above described default thresholding with existing change amount, so during this time, need not carry out the operation of " adding up ", but directly start snapshot with existing change amount.
So, can on the basis of the foregoing description one, after obtaining the data change amount of critical area, enter step S2034.
Step S2034, judge that whether this change amount surpasses default thresholding, if directly enter step S206; Otherwise, enter step S204.
Need to prove, among above-mentioned all embodiment, can regard the LUN critical area of setting as crucial LUN, that is to say,, LUN is divided into crucial LUN and non-key LUN, only crucial LUN data change amount is monitored according to user's request.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium.Described storage medium can be ROM (read-only memory) (Read Only Memory, ROM)/random access memory (random-access memory, RAM), magnetic disc or CD etc.
The embodiment of the invention also discloses a kind of data protecting device simultaneously.
Please refer to Fig. 4, be the structural representation of the embodiment one of a kind of data protecting device of the present invention.
Data protecting device comprises:
The course of work and the principle of work of this data protecting device are as follows:
The data of 111 pairs of default LUN critical areas of described first processing unit are monitored, and when the data of this critical area change, obtain data change amount.
The setting of described LUN critical area can be set with reference to the LBA scope as required by the user, and for example the space in a certain section on the LUN or a few sections LBA scopes is set to critical area.Perhaps LUN is carried out subregion, for example be divided into A, B, C, D, E ..., for example A, B subregion are set at critical area with wherein certain or some subregion.
The monitoring that the data of 111 pairs of default LUN critical areas of described first processing unit are carried out can periodically be carried out.
The user is to the increase of the data of critical area, deletion or upgrade the change that all can cause data, so, can be when the user operates, judge that this operation is whether at the write operation of described critical area, if then there is dual mode specified data change amount:
First kind is: obtain the caused data change of this time write operation amount, itself and existing data change amount are carried out addition, the result is defined as data change amount.
Also there is another kind of mode, some the time, in user's the single job, very big change takes place in the data of critical area, may need not to add up just above described default thresholding with existing change amount, so during this time, so the data change amount that described data change amount caused in the time of also can being certain at the write operation of default LUN critical area.
Described judging unit 112 judges whether described data change amount surpasses default thresholding, and sends judged result.Described default thresholding can be set according to user's real needs, and can adjust at any time.
Described second processing unit 114 receives described judged result, when described judged result indicates described data change amount to surpass described default thresholding, sends the command information that indication starts snapshot, and further will have the change amount now and be changed to zero.Existing change amount can be stored on the default address, and when the data change amount of judging first processing unit 111 and providing when judging unit 112 surpassed default thresholding, the existing change amount that described second processing unit 113 will be preset on the address was changed to zero.
Fig. 5 shows the structural representation of the embodiment two of a kind of data protecting device of the present invention.
On the basis of embodiment one, can further include the 3rd processing unit 114, the 3rd processing unit 114 same judged results that receive judging unit 112, when described judged result indicates described data change amount not surpass default thresholding, utilize this data change amount to upgrade described existing change amount, the existing change amount after upgrading equals described data change amount.
When judging unit 112 was judged accumulation result that first processing unit 113 provides and do not surpassed default thresholding, described the 3rd processing unit 114 utilized this data change amount that the existing change amount on the described default address is upgraded.
Need to prove, among above-mentioned all embodiment, can regard the LUN critical area of setting as crucial LUN, that is to say, according to user's request, LUN is divided into crucial LUN and non-key LUN, first processing unit 111 is only monitored crucial LUN data change amount.
As can be seen, what the embodiment of the invention adopted is quantitative strategies, also promptly: the monitoring of the data by 111 pairs of LUN critical areas of first processing unit, obtain data change amount, and when the data change amount of this critical area surpasses default thresholding, start snapshot by second processing unit, 113 transmission information.
The user do not operate during, perhaps user's operation only relates to the outer data of critical area, that is to say, under the situation that the critical area data do not have to change or the change amount is less, do not start snapshot, reduce the number of times of snapshot, reduce resource overhead thus, and then increase work efficiency.
And specific aim is strong (only reacting at the data of critical area), improved resource utilization.
In addition, decision logic is clear succinct.
The present invention also discloses a kind of memory device.
Please refer to Fig. 6, be the structural representation of a kind of memory device of the present invention.
This memory device comprises data protecting device 100, snapshot unit 200 and source LUN300.
Source LUN300 uses the LUN that data storage and addressing space are provided for basic service.
Described snapshot unit 200 is used for source LUN300 fast implementation is shone.
The principle of work and the course of work of this memory device are as follows:
The data of 100 pairs of default critical areas of described data protecting device are monitored, when the data of finding this critical area change, obtain data change amount, judge whether this data change amount surpasses default thresholding, if, transmission is used to indicate the information that starts snapshot to snapshot unit 200, and further available data change amount is changed to zero; Otherwise, utilize this data change amount to upgrade described existing change amount.
Described existing change amount can be stored on the default address, and described default thresholding can be set according to user's real needs, and can adjust at any time.
The user is to the increase of the data of critical area, deletion or upgrade the change that all can cause data, so, can be when the user operates, judge that this operation is whether at the write operation of described critical area, if then there is dual mode specified data change amount:
First kind is: obtain the caused data change of this time write operation amount, itself and existing data change amount are carried out addition, the result is defined as data change amount.
Also there is another kind of mode, some the time, in user's the single job, very big change takes place in the data of critical area, may need not to add up just above described default thresholding with existing change amount, so during this time, so the data change amount that described data change amount caused in the time of also can being certain at the write operation of default LUN critical area.
Fig. 7 shows the structural representation of data protecting device of the embodiment one of a kind of memory device of the present invention.
Data protecting device comprises: first processing unit 111, judging unit 112 and second processing unit 113.
Fig. 8 shows the structural representation of data protecting device of the embodiment two of a kind of memory device of the present invention.
On the basis of the foregoing description one; this data protecting device can further include the 3rd processing unit 114; be used to receive the judged result of judging unit 112; when described judged result indicates described data change amount not surpass default thresholding; utilize this data change amount to upgrade described existing change amount, the existing change amount after upgrading equals described data change amount.
The course of work and the principle of work of the data protecting device of embodiment one and embodiment two were described in detail at preamble, did not repeat them here.
More than disclosed only be preferred implementation of the present invention; but the present invention is not limited thereto; any those skilled in the art can think do not have a creationary variation, and, all should drop in protection scope of the present invention not breaking away from some improvements and modifications of being done under the principle of the invention prerequisite.
Claims (10)
1. a data guard method is characterized in that, comprising:
When the data of default logical unit number LUN critical area change, obtain data change amount, wherein, the setting of described critical area comprises: set with reference to the LBA (Logical Block Addressing) scope;
Judge that whether described data change amount surpasses a default thresholding, if described this data change amount surpasses described default thresholding, then starts snapshot; If described data change amount does not surpass described default thresholding, then do not start snapshot.
2. data guard method as claimed in claim 1 is characterized in that, the data change amount the when data that described data change amount is the LUN critical area change.
3. data guard method as claimed in claim 1 is characterized in that, data change amount the when data that described data change amount is the LUN critical area change and existing data change amount sum.
4. data guard method as claimed in claim 1 is characterized in that, behind the startup snapshot, existing data change amount is changed to zero.
5. data guard method as claimed in claim 4 is characterized in that, the described snapshot that do not start comprises: described data change amount is updated to existing data change amount.
6. data guard method as claimed in claim 1 is characterized in that, described LUN critical area is one section default LBA (Logical Block Addressing) scope, the perhaps default subregion of LUN.
7. a data protecting device is characterized in that, comprising:
First processing unit when the data of logic of propositions unit number LUN critical area change, obtains data change amount, and wherein, the setting of described critical area comprises: set with reference to the LBA (Logical Block Addressing) scope;
Judging unit is used to judge whether described data change amount surpasses a default thresholding, and sends judged result;
Second processing unit is used for sending the information that indication starts snapshot when described judged result indicates described data change amount to surpass described default thresholding;
The 3rd processing unit is used for utilizing this data change amount to upgrade described existing data change amount when described judged result indicates described data change amount to be no more than described default thresholding.
8. data protecting device as claimed in claim 7 is characterized in that, the data change amount the when data that described data change amount is the LUN critical area change.
9. data protecting device as claimed in claim 7 is characterized in that, data change amount the when data that described data change amount is the LUN critical area change and existing data change amount sum.
10. data protecting device as claimed in claim 7 is characterized in that, described LUN critical area is one section default LBA (Logical Block Addressing) scope, the perhaps default subregion of LUN.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100093797A CN101241456B (en) | 2008-02-28 | 2008-02-28 | Data protection method and device |
| JP2009046172A JP2009266210A (en) | 2008-02-28 | 2009-02-27 | Data protection method, device and storage device |
| US12/394,704 US20090222499A1 (en) | 2008-02-28 | 2009-02-27 | Method, apparatus and storage device for data protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100093797A CN101241456B (en) | 2008-02-28 | 2008-02-28 | Data protection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101241456A CN101241456A (en) | 2008-08-13 |
| CN101241456B true CN101241456B (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100093797A Expired - Fee Related CN101241456B (en) | 2008-02-28 | 2008-02-28 | Data protection method and device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20090222499A1 (en) |
| JP (1) | JP2009266210A (en) |
| CN (1) | CN101241456B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9632875B2 (en) | 2010-10-06 | 2017-04-25 | International Business Machines Corporation | Automated and self-adjusting data protection driven by business and data activity events |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101359301A (en) | 2008-08-19 | 2009-02-04 | 成都市华为赛门铁克科技有限公司 | Auto snapshot method and device |
| CN101901175A (en) * | 2010-02-11 | 2010-12-01 | 宇龙计算机通信科技(深圳)有限公司 | Data backup method and electronic terminal |
| US9740571B1 (en) * | 2013-10-11 | 2017-08-22 | EMC IP Holding Company LLC | Intelligent continuous data protection snapshot based backups |
| CN103842954B (en) * | 2013-12-05 | 2017-02-15 | 华为技术有限公司 | Data processing method, device, system and server in storage system |
| WO2016008094A1 (en) * | 2014-07-15 | 2016-01-21 | 华为技术有限公司 | Data replication method, device and system |
| CN104317675B (en) * | 2014-11-21 | 2017-08-11 | 华为技术有限公司 | The disaster tolerance treating method and apparatus of application |
| WO2019161551A1 (en) * | 2018-02-24 | 2019-08-29 | 黄裕才 | Method for processing log based on logrotate technology |
| CN109491961B (en) * | 2018-10-22 | 2022-02-18 | 郑州云海信息技术有限公司 | File system snapshot method and snapshot device |
| JP7093799B2 (en) * | 2020-01-27 | 2022-06-30 | 株式会社日立製作所 | Storage system and restore control method |
| CN112069535B (en) * | 2020-08-13 | 2023-01-31 | 中国电子科技集团公司第三十研究所 | Dual-system safety intelligent terminal architecture based on access partition physical isolation |
| CN112214354A (en) * | 2020-10-21 | 2021-01-12 | 上海英方软件股份有限公司 | Rapid recovery method and device for continuous data protection |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09237212A (en) * | 1996-03-01 | 1997-09-09 | Nec Corp | File backup system |
| JPH10154092A (en) * | 1996-11-22 | 1998-06-09 | Fuji Xerox Co Ltd | Database management system |
| US7203732B2 (en) * | 1999-11-11 | 2007-04-10 | Miralink Corporation | Flexible remote data mirroring |
| JP3955453B2 (en) * | 2001-10-09 | 2007-08-08 | 株式会社日立製作所 | Control method of external storage device |
| US7392324B2 (en) * | 2004-08-13 | 2008-06-24 | International Business Machines Corporation | Consistent snapshots of dynamic heterogeneously managed data |
| JP4545529B2 (en) * | 2004-08-27 | 2010-09-15 | 株式会社日立製作所 | Snapshot creation method and program, and storage system |
| US7395378B1 (en) * | 2005-01-04 | 2008-07-01 | Symantec Operating Corporation | System and method for updating a copy-on-write snapshot based on a dirty region log |
| JP2007280323A (en) * | 2006-04-12 | 2007-10-25 | Hitachi Ltd | Storage system and data management method |
| US7865677B1 (en) * | 2006-06-29 | 2011-01-04 | Emc Corporation | Enhancing access to data storage |
| US8452756B2 (en) * | 2006-11-09 | 2013-05-28 | International Business Machines Corporation | Database execution detail repository |
| US7676510B1 (en) * | 2006-12-22 | 2010-03-09 | Network Appliance, Inc. | Space reservation monitoring in a fractionally reserved data storage system |
| CN101359301A (en) * | 2008-08-19 | 2009-02-04 | 成都市华为赛门铁克科技有限公司 | Auto snapshot method and device |
-
2008
- 2008-02-28 CN CN2008100093797A patent/CN101241456B/en not_active Expired - Fee Related
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2009
- 2009-02-27 JP JP2009046172A patent/JP2009266210A/en active Pending
- 2009-02-27 US US12/394,704 patent/US20090222499A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9632875B2 (en) | 2010-10-06 | 2017-04-25 | International Business Machines Corporation | Automated and self-adjusting data protection driven by business and data activity events |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090222499A1 (en) | 2009-09-03 |
| JP2009266210A (en) | 2009-11-12 |
| CN101241456A (en) | 2008-08-13 |
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